--TEST--
Bug #64887: Allow DateTime modification with subsecond items
--INI--
date.timezone=UTC
--FILE--
<?php
$tests = [
	'+1 ms',
	'-2 msec',
	'+3 msecs',
	'-4 millisecond',
	'+5 milliseconds',

	'-6 usec',
	'+7 usecs',
	'-8 microsecond',
	'+9 microseconds',
	'-10 µs',
	'+11 µsec',
	'-12 µsecs',

	'+8 msec -2 µsec',
];

$datetime = new DateTimeImmutable( "2016-10-07 13:25:50" );

foreach ( $tests as $test )
{
	echo $datetime->modify( $test )->format( 'Y-m-d H:i:s.u' ), "\n";
}

?>
--EXPECT--
2016-10-07 13:25:50.001000
2016-10-07 13:25:49.998000
2016-10-07 13:25:50.003000
2016-10-07 13:25:49.996000
2016-10-07 13:25:50.005000
2016-10-07 13:25:49.999994
2016-10-07 13:25:50.000007
2016-10-07 13:25:49.999992
2016-10-07 13:25:50.000009
2016-10-07 13:25:49.999990
2016-10-07 13:25:50.000011
2016-10-07 13:25:49.999988
2016-10-07 13:25:50.007998
